What is the size of a Chrysler 318 bored 040 over?

A Chrysler 318 engine bored 0.040 inches over will have a displacement of approximately 5.2 liters or 318 cubic inches plus the additional volume from the increased bore. The original 318 has a bore of 3.91 inches and a stroke of 3.31 inches. By boring it 0.040 inches larger, the new bore would be 3.95 inches, slightly increasing the overall engine displacement. This modification typically results in a small increase in power and torque.